Burner control and pilot light for gas stoves



B. VICTOR ET AL Jan. 17, 1933.

BURNER CONTROL AND PILO'iIi LIGHT FOR GAS STOVES Filed Nov. 25, 1931 2 Sheets-Sheet BURNER CONTROL AND PILOT LIGHT FOR GAS STOVES Filed Nov. 25. 1931 2 Sheets-$heet 2 lnvcnlorg Patented Gian. E7 1933 PATENT OFFICE 7 UNITED STATES BENJAMIN VICTOR AND RICHARD E. ABRAMSON, OF NEW YORK, N. Y.

BURNER CONTROL AND PILOT LIGHT FOR GAS STOVES Application filed November 23, 1981. Serial No. 576,854.

This invention relates to improvements in gas stoves and has particular reference to an automatic burner control and pilot l1ght.

The primary object of the invention resldes in a burner control wherein the flow of gas is turned on to the burner when a cooklng utensil is placed over the burner, and wherein the gas is automatically shut off when the utensil is removed, together with a pilot light 30 which operates to light the burner when the flow of gas thereto is turned on. This eliminates the necessity of manually turning the gas on and oii and the separate operation of a pilot for lighting the same when turned on.

Another object of the invention is to effeet a saving of gas in the operation of a multiple burner gas stove, as the burners only remain turned on as long as 'a vessel is positioned thereover, and in which the gas to the common pilot burner is only turned on to its maximum flow for an instant during the turning on of the gas flow to the burner. A further object of the invention is the provision of a combined gas burner and pilot control device which is simple of construction, easy to instal, and positive of operation.

With these and other objects in view, the invention resides in the certain novel construction, combination and arrangement of parts, the essential features of which are hereinafter full described, are particularly ointed out in the appended claims and are illustrated in the accompanying drawings, in which:

Figure 1 is a top plan view of a gas stove with the grill top removed and showing our invention applied thereto.

Figure 2 is an enlarged vertical sectional view on the line 22 of Figure 1.

Figure 3 is a detail perspective view of the pilot device.

Figure 4 is a detail perspective view of the pilot burner tip.

Referring to the drawings by reference characters the numeral 10 designates a gas stove whic includes the usual ring like burners l1, and in this instance" four of such burners have been shown. Extending from the respective burners are fuel con noting pipes 12 terminating in an air and gas mixing chamber 13. The numeral 14 designates the gas manifold or gas supply pipe to which burner control valves 15 are connected and which valves have their outlets extending into the mixing chambers 13. These valves are arranged in a row at the front of the gas stove and in order to position them so it is necessary that the inlet pipes 12 to the burners be curved or bent as shown in Figure 1 of the drawing. This curving of the pipes is also necessary sons to equidistantly space the burners about a central and common pilot device 16 which is operable for lighting the burners when the flow of gas thereto is turned on. A gas supply pipe.l7 leads to the pilot device 16 and also acts to support the same in position.

' In view of the fact that each of the valves 15 is of identical construction as is the control means therefor, a description of one will sufiice for the other. Each valve 15 comprises a body 18 having a tapered bore 19 therein, and in which a valve member or plug 20 is slidably mounted. A screw cap 21 closes the top end of the body while a spring 22 is interposed between the cap and the top of the valve member 20 to normally tend to seat the valve member against the walls of the tapered bore 19. The valve member 20 is provided with a transversely disposed passage 23 normally positioned below the inlet and outlet sides of the valve body but which is adapted to be brought into registration with the inlet and outlet to establish communication between the manifold pipe 14 and the respective burner 11. A stem 24 fixed to the valve member 20 extends beyond the lower end of the body 18 and terminates in a rounded head 25. It will therefore be seen that upon upward movement of the valve member 20 by a pressure against the head 25, the valve may be moved to open position to permit of the flow of the gas to the burner controlled thereby. Pivoted beneath the burner 11 as at 26 is a rock lever 27 and the same is bent to extend parallel with the respective gas inlet pipe 12 so as to be concealed therebeneath. The forward end of the rock lever 27 is provided with .ports a roller 29.

a seat or cavity 28 for the reception of the rounded head 25 of the valve stem, while the opposite end of the rock lever rotatably sup- Extending vertically through the ring like burner 11 is a socket member 30 which is fixed to the rock lever 27 rearward of the pivot 26. The socket member 30 is provided with slots 31 of different length which open through the top edge of the member to receive the pin 32 fixed to the lower end of an actuating rod 33. This rod forms part of what may be termed a depressible member 34, and the upper end of the rod is provided with a fiat rounded head 35. The depressible member 34 may be lifted out of the socket and repositioned therein so that the pin 32 may be positioned in any one of the varied length slots 31 depending upon the length of downward movement necessary for the actuation of the rock lever 27. The head 35 of the depressible member normally extends above the horizontal plane of the top of the gas stove 10 and which member is adapted to be depressed by the placing of a cooking utensil over the burner 1 The pilot device 16 hereinbefore mentioned comprises a block or body 36 having a chamber 37 into which gas from the supply tube or pipe 17 passes. The top wall of the chamber is provided with a valve seat engageable by a bevel valve member or head 38, while the lower wall of the chamber is likewise provided with a valve seat for reception of a bevel valve member 39. The valve members 38 and 39 are mounted on a valve stem 40 which extends downwardly through the body 36 and carries an enlarged beveled or rounded head 41. The spring 42 is interposed between the head 41 and a portion of the body 36 and which tends to normally maintain the valve heads 38 and 39 in seated position upon the respective seats. The enlarged head 41 is provided with an upwardly extending hub or collar 43 which is slidable in a recess 44 in which the spring 42 is mounted, and which structure serves to guide the valve stem 40 during its sliding movement, although the fit between the collar 43 and the walls ofthe recess 44 is loose in order to permit air to pass therebetween and enter the chamber 37 to mix with the gas when the burner control valve is in open position.

Supported upon the body 36 and disposed above the valve. head 38 is a burner tip 45 which is enclosed by a perforated housing 46, the said perforations acting as flame openings.

Extending downwardly from the body 36 are sets of spaced. ears 47 and pivotally supported as at 48 by the pairs of ears are levers 49. One end of each lever is curved upwardly as at 50 and bears against the beveled head 41 while the opposite end of each lever or rock arm rotatably supports a ratchet wheel 51. A pivoted dog 52 is carried by the rock arm 49 and is ressed into contact with the periphery oft e ratchet wheel by a spring 53. The ratchet wheel 51 is disposed in the path of downward movement of the rear end of the rock lever 27 so as to be engaged thereby for im arting upward movement to the curved en 50 of the rock arm 49 for the purpose of unseating the valves 38 and 39 to increase'the flow of gas and air to the pilot burner tip 45. It might here be stated that a by-pass 54 is rovided in the body 36 between the supp y tube or pipe 17 and the burner tip 45 for the purpose of permitting a limited amount of gas to flow to the pilot burner at all times, the flame from which is confined within the housing 46. By increasing the flow of gas to the burner tip 45., a

reater pressure is obtained which causes ets of flame to be projected from all sides of the housing 46 and which are of sufiicient length to ignite any of the burners whose control valves have been turned on.

In operation, assume that the parts are in the full line position shown in Figure 2 of the drawings, gas to the burner is shut 06.. Upon the placing of a cooking utensil or vessel over the burner, the same will cause the member 34 to be depressed which in turn imparts a downward movement to the rearend of the rock lever 27. During this movement the forward end of the rock lever actuates the valve plug 20 to establish communication between the supply pipe 14 and the respective burner 11. During this downward movement of the rock lever, the roller 29 at 51 and due to the fact that the initial downward pressure exerted upon the ratchet wheel is insufficient to turn the ratchet wheel the rock arm 49 will be actuated, which in turn moves thevalve stem 40 upwardly, and causes the valves 38 and 39 to open. Just as soon as the pressure upon the ratchet wheel overcomes the tension of the spring pressed dog 52, the wheel will turn and permit the rock lever to drop to the dotted line position shown at which time the pilot control valve l will return to closed position. Thus it will be seen that the pilot light is only actuated under the maximum supply of gas momentarily or for a sufficient tlme to ignite the burner whose control valve has been turned The control valve of the burner will remain open as long as the pot or pan holds- 100 the rear end thereof strikes the ratchet wheel 1! that various changes that come within the scope of the appended claims may be resorted to if desired.

Having thus described the invention, what we claimas new and desire to secure as Let ters Patent is 1. In combination with the gas bu ner of a gas stove, a gas supply pipe leading to said burner, a burner control valve for regulating the flow of gas from said gas supply pipe to said burner, a depressible member using through and above the plane of the top of said gas burner, a pilot burner connected to a source of gas supply, a pilot burner control valve, spring means acting to normally shut ofi communication between said pilot burner and said source of gas supply, a restricted passage between said pilot burner and its source of supply to permit a limited amount of gas to flow to said pilot burner when said pilot control valve is closed, spring means tending to normally hold said pilot control valve in shut off position, a rock lever pivotally supported beneath said burner and to which said depressible member is connected, said burner control valve having a sliding leasable therebyfupon downward movement thereof, and spring means acting to move said valve actuating means to valve closin position after release of the same by sairock lever.

tures.

BENJAMIN VICTOR. RICHARD E. ABRAMSON.

valve member with which one end of said rock lever engages, said pilot burner control valve having a slidable valve member, a rock arm having one end engageable with said last mentioned slidable valve member, a ratchet mechanism carried by the other end of said rock arm and disposed in the path of downward movement of the other end of said rock lever, whereby downward movement of said depressible member will cause said rock lever to actuate the sliding valve member of said burner control valve to an open position, and simultaneously engage said ratchet mechanism to cause said rock arm to actuate said pilot valve member to open position until the rock arm moves to a position clear of said ratchet mechanism whereupon said spring means returns said pilot valve member to closed position, and spring means acting upon the burner control valve member to move the same to a closed position and to cause the rock lever and depressible member to likewise return to normal position upon the release of downward pressure upon said depressible member.

2. In combination with a gas burner and its gas supply pipe, a control valve for regulating the flow of gas from said supply pipe to said burner, said control valve including a slidable valve member, a rock lever pivoted beneath said burner, one end of said rock lever being engageable with said slidable valve member, a depressible member fixed to the opposite end of said rock lever, and extending upward through said burner, spring means acting upon the slidable valve member for normally holding said valve member in closed position and the depressible member in a position above the plane of the top of said In testimony whereof we afiix 01in sigma- 

